Everyone likes their salmon cooked a little differently, but I think 90 minutes at 135 is too hot AND too long. For average thickness fillets I go 1 hour at 120 - at that time and temp, the fish is tender, moist and flaky with no translucency. If you want to go to 130, it will firm up a bit more. If it's got skin on, then do a quick sear to crisp it up.